Non-conducting compound



STATES PATENT OFFICE.

FREDERICK SPRINKMANN, OF MILWAUKEE, WISCONSIN, ASSIGNOR OF ONE- IIALF TO \VILLIAM S. GRUBB, OF CHICAGO, ILLINOIS.

NON-CONDUCTING COMPOUND.

SPECIFICATION forming part of Letters Patent No. 445,358, dated January 27. 1891.

Application filed December 13, 1890. Serial No. 374,531. (No specimens.)

To all whom it may concern.-

Be it known that I, FREDERICK SPRINK MANN, a citizen. of the United States, and a resident of Milwaukee, in the county of Mil- 5 waukee, and in the State of \Yisconsin, have invented certain new and useful Improvements in Non-Conducting Compounds; and I do hereby declare that the following is a full clear, and exact description thereof.

My compound is for the purpose of insulating boilers, steam-pipes, and other surfaces from the effect of cold air or fire; and it consists in the combination of certain ingredients, as will be hereinafter described I 5 and subsequently claimed.

In carrying out my invention I take kaolin, ground wood fiber, and the fine downy coverin g of cotton-seed in variable proportions and mix the same together with enough water or 20 other suitable fluid to form a plastic mass, this product being spread upon the surface to be insulated and allowed to set or harden.

In covering boilers, steam-pipes, or other very hot surfaces I use more of the kaolin 25 and less of the fibrous material in the first coat, and for second coat the proportion of kaolin is diminished and that of the fibrous material increased. For surfaces to be protected from cold air I prefer to employ an equal proportion of the kaolin and fibrous o material; but in any case the exact proportion of each may be varied according as circumstances may require, or as may be deemed best in connection with the surface treated.

By the employment of the fine downy cov- 5 erin of cotton-seed as one of the ingredients of my compound I make the latter more tenacious and economize the wood fiber, while at the same time said compound in a plastic state is more easily spread and smoothly fin- 4o ished than is usual with others of a like nature.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

A non-conducting compound consisting of a combination of kaolin, ground wood fiber, and the soft downy covering of cotton-seed, substantially as set forth.

In testimony that I claim the foregoing I 50 have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of Viscousin, in the presence of two witnesses.

FRED. SPRINKMANN.

"Witnesses:

N. E. OLIPHANT, WM. KLUG. 

